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Matt, Mechanical Engineer

Category: UK Car

Satisfied Customers: 20611

Experience: BEng hons Mech engineering, in auto industry 22 years

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113: PaulI have a mb 113 vito, 160,000 mls on clock,

Customer Question

Hi PaulI have a mb 113 vito, 160,000 mls on clock, it cuts out when slowing down to junctions and seems pulse at idle also hunts when accelerating as if the power is on/off up through the rev range although it's not massively noticeable I think it's Down on power a little to..

Hello1st consider changing the fuel filter as if this partially blocked this will reduce pressure.If OK then also check the connections to the EGR valve, if either the vacuum pipe of electrical connection are damaged / corroded then the EGR can be on all time which certainly will hurt performance. Its also possible that its a fault with the EGR valve so its worth removing the valve and cleaning it out with brake cleaner, if it looks particularly clogged then replace it.If this is OK then check the small vacuum lines to the turbo and its connected control solenoid on the bulkhead, any cracks or leaks can give turbo issues and its best to have the boost pressure measured actually measured with a boost gauge to check that the turbo is healthy and that the sensor is reading correctlyIf its a variable vane turbo (they’ll be an actuator on the turbo body - but not a wastegate) then check its vacuum pipework as above and check the connections to the diaphragm / solenoid valve